Embrittlement of poly (L-lactide)/poly (ε-caprolactone) blends upon physical aging

被引：0

作者：

Huayan Pan

Bing Na

Ruihua Lv

Shufen Zou

机构：

[1] East China Institute of Technology,Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, School of Biology, Chemistry and Material Science

来源：

Journal of Polymer Research | 2012年 / 19卷

关键词：

Physical aging; Toughening; Poly (L-lactide); Poly (ε-caprolactone);

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Toughening of poly (L-lactide) (PLLA) by flexible poly (ε-caprolactone) (PCL) is very attractive for biomedical applications. However, PLLA/PCL blends usually behave brittle fracture, which is ascribed to the immiscibility between two components. This study demonstrates that without physical aging dispersed PCL particles can induce significant ductile deformation of PLLA matrix, accompanied by remarkable decreasing of yield strength, opposite to what is observed in the aged blends. It is deduced that segmental mobility of PLLA matrix and crystalline order of PCL domains, rather than immiscibility, play vital role in determining the ductility of PLLA/PCL blends.

引用

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